Connect to phpmyadmin with your browser: https://appliance_ip:12322
Click "storage engines" -> "InnoDB"
This will display InnoDB's configuration and that it is the default storage engine
GOTCHA: Do not be confused by the description of MyISAM
MyISAM Default engine as of MySQL 3.23 with great performance
It is just the description, it is not the engine status
Create a test database with test tables, notice that the default is InnoDB.